Dear Rob Herring,
> On 12/02/2012 10:58 PM, Marek Vasut wrote:
> > Dear Rob Herring,
> >
> >> From: Rob Herring <rob.herr...@calxeda.com>
> >>
> >> Since wfi instruction is only available on ARMv7, add a conditional
> >> macro for it.
> >>
> >> Signed-off-by: Rob Herring <rob.herr...@calxeda.com>
> >> ---
> >>
> >> arch/arm/include/asm/system.h | 6 ++++++
> >> 1 file changed, 6 insertions(+)
> >>
> >> diff --git a/arch/arm/include/asm/system.h
> >> b/arch/arm/include/asm/system.h index 2b28a26..2f6aecd 100644
> >> --- a/arch/arm/include/asm/system.h
> >> +++ b/arch/arm/include/asm/system.h
> >> @@ -61,6 +61,12 @@
> >>
> >> #define nop() __asm__ __volatile__("mov\tr0,r0\t@ nop\n\t");
> >>
> >> +#ifdef __ARM_ARCH_7A__
> >> +#define wfi() __asm__ __volatile__ ("wfi" : : : "memory")
> >> +#else
> >> +#define wfi()
> >> +#endif
> >
> > Won't this break other (non-arm) systems? Moreover, maybe you can make
> > this an (inline) function instead?
>
> How? It is in an ARM specific header and empty on anything but ARMv7
> enabled compiler. This follows the kernel implementation and the nop above.
Ok, I missed the arch/arm. It's ok then, sorry for the noise.
[...]
Best regards,
Marek Vasut
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